JPS6129418Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a reciprocating electric shaver in which an inner cutter body, which is made up of a plurality of inner cutter blades held together side by side by a pipe, slides on the inner surface of an outer cutter.

In conventional razors of this type, the inner cutter is held in an inner cutter holder, and the engagement hole formed on the lower surface of the inner cutter holder is protruded from the upper surface of the driver that is reciprocated by an eccentric device. By engaging the tip of the drive rod, the power of the driver is transmitted to the inner blade via the inner blade holder,
Furthermore, the spring force of the coil spring attached to the drive rod is applied to the inner blade holder to elastically support the inner blade so that it can move up and down.

By the way, the hair debris during shearing not only adheres between the inner cutters of the inner blade body, but also often scatters and adheres to the underside of the inner blade holder, and the hair debris in this area is removed by the eccentric device. It is preferable to remove it before it reaches the motor side.

However, in the above configuration, since the coil spring for pushing up the inner blade body is attached to the drive rod,
The hair debris scattered to the lower side of the inner blade holder also enters the coil spring, making it troublesome to remove the hair debris and tends to be left as is.

This invention eliminates the need to attach a coil spring for pushing up the inner cutter to the drive rod, and instead supports the inner cutter elastically so that it can move up and down relative to the inner cutter holder, making it easier to remove hair debris. The purpose of the present invention is to provide a reciprocating electric shaver that can perform reciprocating motion.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 1, 11 is a main body case made of synthetic resin or the like, 12 is a motor housed in the case 11, and is firmly fixed to the upper wall of the case 11 with screws 13, 13, etc. Reference numeral 14 designates an eccentric base body fixed to the rotating shaft 15 of the motor 12, on which an eccentric shaft 16 is protruded. Reference numeral 17 denotes a driver disposed on the upper wall surface of the main body case 11 so as to be slidable in the left-right direction (in the directions of arrows a and b). In this embodiment, in order to allow the driver 17 to slide smoothly, the bottom surface of the driver 17 and the main body case 11 are
A steel ball 18 is interposed between the upper wall surface and the upper wall surface. 19
20 is a bearing portion formed on the lower surface of the drive element 17 and into which the eccentric shaft 16 is fitted;
21 is a drive rod protruding from the top surface of the drive element 1.
This is a cover that covers 7. This driver cover 21 is fixed to the main body case 11 with the motor mounting screws 13, 13, and hollow boss portions 22, 22 formed on the back surface of which the screws are inserted guide the driver 17. It also serves as the body.

Reference numeral 23 designates an inner cutter body, which includes a plurality of circular inner cutters 24 and a metal, for example, brass pipe 2 that holds these inner cutters 24 in a skewer shape.
5, with openings 25 at both ends of this pipe 25.
In a, 25b, there are rolling elements 26, 2 such as steel balls.
6 is held in a retractable manner by drawing or the like.
Reference numeral 27 denotes an elastic body, such as a coil spring, disposed within the pipe 25, and the rollers 26, 26
This applies an elastic force outward in the axial direction.

Reference numeral 28 denotes an inner blade holder, and vertical wall portions 29, 29 are formed at both left and right ends, and each vertical wall portion 29, 2
As clearly shown in FIG. 2, engaging recesses 30, 30 for locking the inner cutter body 23 via the rollers 26, 26 are formed on the facing surfaces of the 9, respectively, and the engaging recesses A tapered surface 3 that descends inward from 30 and forms a rolling support surface for the rolling elements 26, 26.
1 and 31 are formed. Reference numeral 32 denotes a guide groove for guiding the rotor 26 from the engagement recess 30 to the tapered surface 31. (Figure 3). 33 is a tapered surface for smoothly introducing the rolling elements 26, 26 into the engagement recess 30 when the inner cutter body 23 is installed. A recess 34 is formed on the lower surface of the inner blade holder 28, and the tip of the drive rod 20 is fitted into the recess 34. Reference numeral 35 denotes an outer cutter holder holding the outer cutter 36, which is attached to the upper end of the main body case 11. In this attached state, the inner cutter body 23 is pressed against the inner surface of the outer cutter 36. ing.

In the above configuration, the pushing force from the skin is applied to the outer blade 3.
When the inner blade body 23 is biased through the pipe 2
The rollers 26, 26 at both ends of the inner blade holder 28
slides from the engaging recesses 30, 30 to the tapered surfaces 31, 31, and the coil springs 27, 27 in the pipe 25 are compressed accordingly, so that the elastic reaction force opposing the pushing force is It can be caused in the inner cutter body 23, that is, the outer cutter 3 as shown in FIG.
The inner blade body 23 can be elastically moved up and down according to the deformation of the blade 6.

Here, even if hair chips are scattered below the inner blade holder 28, the hair chips can be easily removed because no spring for pushing up the inner blade is attached to this portion.

Furthermore, in this embodiment, the inner cutter blade 24 constituting the inner cutter body 23 is circular and its center is supported by the pipe 25. It is possible to rotate around the axis through point contact via the rotors 26, 26 at both ends of the pipe 25, and therefore, depending on the pushing direction of the outer cutter 36, the inner cutter body 23 rotates and the inner surface of the outer cutter 36 is rotated. The contact with the blade changes constantly, thus improving the sharpness.

FIG. 5 shows another embodiment, in which the inner cutter blade 24 is
It is supported by real pipes 25, 25. In this case, the inner blade body 23 is held with four-point support to the inner blade body holder 28, so that the push from the skin M as shown in FIG. Pipe 2 is tilted in the direction due to force F.
In other words, the elastic force of the coil spring 27 in the outer cutter 36 is strongly biased, and in other words, the part of the outer cutter 36 pushed into the skin M receives a reaction force F' that is larger than the reaction force F'' in other parts. This results in effective shearing.

As described above, this invention provides a reciprocating electric shaver that makes it easy to remove hair debris by supporting the inner blade elastically so that it can move up and down relative to the inner blade holder rather than supporting the inner blade holder from below with a coil spring or the like.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an example of a reciprocating electric shaver according to the invention, Fig. 2 is a perspective view showing the main parts of the electric shaver, Fig. 3 is a sectional view of the guide groove, and Fig. 4. 5 is an explanatory diagram of the same action, FIG. 5 is an explanatory diagram of another embodiment, and FIG. 6 is an explanatory diagram of the same action. 23... Inner blade body, 24... Inner blade small blade, 25...
Pipes, 25a, 25b...Openings at both ends, 26...
... Roller, 27 ... Bullet body, 28 ... Inner blade holder, 29 ... Vertical wall, 30 ... Engagement recess, 31 ...
Tapered surface, (axial motion support surface), 36... Outer blade.

Claims (1)

[Scope of utility model registration request] The inner cutter body 23 is formed by supporting a plurality of inner cutter blades 24 in a skewered manner with a metal pipe 25, and the outer cutter 36
In the reciprocating electric shaver that is brought into sliding contact with the inner surface of the pipe 25, the left and right end openings 25a,
25b has a projectile 27 disposed inside this pipe 25.
The vertical walls 29, which are protruded from both left and right ends of the inner blade holder 28, hold the rolling elements 26, 26, which are biased by an elastic force outward in the axial direction, so as to be able to protrude and retract, respectively.
Engagement recesses 30, 30 are removably engaged with the rollers 26, 26 on the opposing surfaces of the rollers 29, and the rollers 26 descend inwardly from the respective engagement recesses 30.
A reciprocating electric shaver in which a tapered surface 31 forming a rolling support surface of Nos. 6 and 26 is formed.